ML20008G293
| ML20008G293 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/30/1981 |
| From: | PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | |
| Shared Package | |
| ML20008G291 | List: |
| References | |
| NUDOCS 8107070280 | |
| Download: ML20008G293 (4) | |
Text
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i PBAPS Unit 3 LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REOUIREMENTS 3.5.J Local LHGR (Cont'd) 1 If at any time during operation it is determined by normal surveillance that limiting value for LHGR is being exceeded, action shall be initiated within one (1) hour to restore LHGR to within prescribed limits.
If the LHGR is not returned to within prescribed limits within five (5) hours, reactor power shall be decreased at a rate which would bring the reactor to the cold shutdown condition within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> unless LHGR is returned to within limits during this period.
Surveillance and corresponding action shall continue until reactor operation is within the prescribed limits.
3.5.K.1 Minimum Critical Power 4.5.K Minimum Critical Power Ratio (MCPR)
Ratio (MCPR)
- 1. During power operation, the MCPR 1.
MCPR shall be checked daily for the applicable incremental during reactor power operation cycle core average exposure and at >25% rated thermal power.
for each type of fuel shall be 2.
Except as provided in Specification l equal to or greater than the value 3.5.K.3, the verification of given in Specification 3.5.K.2 or the applicability of 3.5.K.2.a 3.5.K.3 times Kf, where Kf is as Operating Limit MCPR Values shown in Figure 3.5.1.E.
If at shall be performed every 120 any time during operation it operating days by scram time is determined by normal testing 19 or more control surveillance that the limiting rods on a rotating basis and value for MCPR is being performing the following:
exceeded, action shall be initiated within one (1) hour a.
The average scram time to restore MCPR to within prescribed to the 20% insertion limits. If the MCPR is not position shall be:
returned to within prescribed 7" ave 5 7B limits within five (5) hours, reactor power shall be decreased b.
ine average scram time at a rate which would bring the to the 20% insertion reactor to the cold shutdown position is determined condition within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> unless as follows:
MCPR is returned to within limits i
during this period. Surveillance n
and corresponding action shall
) Pave = I Ni7l continue until reactor operation i=1 l
is within the prescribed f
limits.
I -Ni i=1 where: n = number of l
surveillance tests performed hD to date in the cycle.
DO O O 02 8 P
PDRj
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PBAPS LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REOUIREMENTS 3.5.K. Minimum Critical Power 4.5.K.
Minimum Critical Power Ratio MCPR (Cont'd)
Ratio-MCPR (Cont'd) number of active control
- 2. Except as specified in 3.5.K.3, Ni
=
the Operating Limit MCPR Values rods measured in the ith are as follows:
surveillance test, a.
If requirement 4.5.K.2.a is met:
The Operating Limit MCPR values y
average scram time to are as given in Table 3.5.K.2
/i
=
the 20% insertion position of all rods measured in b.
If requirement 4.5.K.2.a is not the ith surveillance test.
met:
The Operating Limit MCPR c.
The adjusted analysis mean values as a function of r scram time GF ) is calculated B
are as given in Figures as follows:
3.5.K.1 and 3.5.K.2.
/
'N N1
[B=p+1.65I
@~
n
)Y g
Where:
Where:
7~=,['ve-)I a
B j/ = mean of the distribution 0.90 B for average scram insertiori time to the 20% position =
0.710 sec
- 3. The Operating Limit MCPR values Ni = total number of active shall be as given in Table 3.5.K.3 control rods measured in if the Surveillance Requirement specification 4.3.C.1 of Section 4.5.K.2 to scram time test control rods is not U
= standard deviation of the performed distribution for average scram insertion time to the 20% position = 0.053.
-nppe-
PBAPS Unit 3 Table 3.5.K.2 OPERATING LIMIT MCPR VALUES FOR VARIOUS CORE EXPOSURES
. 2000 MWD /t before EOC Before EOC To EOC 8x8 1.24 1.27 PTA &P 8X8R 1.25 1.30 i
8x8R 1.24 1.27 If requirement 4.5.K.2.a is met.
i, I
l l
l l
l l
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PBAPS Unit 3 Table 3.5.K.3 OPERATING LIMIT MCPR VALUES FOR VARIOUS CORE EXPOSURES
- MCPR Operating Limit Fuel Type For Incremental Cycle Core Average Exposure BOC to 2000 MWD /t 2000 MWD /t bcfore EOC Before EOC To EOC 8x8 1.33 1.39 PTA &P 8X8R 1.36 1.42 8x8R 1.33 1.39 If surveillance requirement of section 4.5.K.2 is not performed.
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